iPad works nicely in the niche between my iPhone and my laptop
- Overall
Rated 4 out of 5
Ultimately, I'd say that the iPad (or any tablet really) is a luxury device and not essential if you already have an iPhone (or Android smartphone) and a laptop/desktop computer.
The iPad provides more screen real estate for your apps than your mobile, but frankly isn't super "mobile" itself (don't try using one while standing in a crowded subway, for example).
On the other side, it's just not as powerful or flexible as your main computer. I find that I use my iPad mostly for reading books (Kindle app and iBooks) which is something I wouldn't do on the laptop.
I have the wifi only version, but I can see how getting the 3G capable iPad would make this more attractive for traveling.
So ...
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